Sectional wheel.



No. 784,655. PATENTED MAR. 14, 1905. F. 0. BIGGERT, JR.

SEGTIONAL WHEEL.

APPLICATION FILED 00T.19, 1904.

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WITNESSES I INVENTOR zfliwdzwafl/ I l bolts or otherwise.

Patented March 14, 1905.

PATENT OFFICE.

FLORENCE C. BIGGERT, J 11., OF IDLENOOD, PENNSYLVANIA.

SECTIONAL WHEEL.

SPECIFICATION formingpart of Letters Patent No. 784,655, dated March 14, 1905.

Application filed October 19, 1904:. Serial No. 229,112.

T (tZZ whom, it inn/y concern.-

Be it known that I, FLORENCE O. BIGGER'I, J r., a citizen of the United States, residing at Idlewood. in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Sectional WVheels, of which the following is a specification.

My invention relates to sectional wheels whose working rims are made separate from the remaining parts thereof, so that in case any portion becomes worn or broken a new portion may be inserted in its place.

- I do not restrict my invention to a wheel of any definite peripheral construction, as it is as applicable to sprocket-wheels, pulleys, and the like as to cogwheels.

1n the accompanying drawings, which form a part hereof, Figure 1 is a side elevation of a wheel embodying my invention, the lower portion being broken away; Fig. 2, a central vertical section thereof; Fig. 3, a top plan view of a portion of the wheel containing the key for preventing rotation of the rim; Fig. 4:, a side view of the same portion of the wheel, showing the key in end elevation; Fig. 5, asection of the same portion of the wheel, showing the key in side elevation; Fig. 6, a fragmentary view showing the keyway in the rim, and Fig. 7 an elevation at right angles to Fig. 6.

Referring now to the drawings for a detailed description of my invention, 1 designates the hub of a wheel having the web 2 and the peripheral portion 3. The latter is made up of the integral portion 4, the detachable portion 5, and the rim 6, secured together by The portion i stands at an angle to the web 2 and has its free edge extending back over itself, forming the lip or flange 7 and the groove 8. The groove 8 has its outer wall inclined outwardly and toward the hub, and the outer surface of the lip 7 is inclined outwardly and away from the hub.

The web 2 has the recess 9, in which the web portion of the portion 5 is seated. The wheel portion 5 has a lip or flange 7 and groove 8 like that of the portion 4:; but the flanges 7 stand opposite to or are facing each other. Likewise the grooves 8 open toward each other, as shown on Fig. 2. The rim 6 of the wheelis provided with lateral annular grooves 11, having their inner and outer walls converging to correspond to the walls of the flanges 7. One of the grooves 11 is fitted on the flange 7 of the wheel portion 4, and the portion 5 is then applied with its flange 7 fltting in the remaining groove 11, as shown on Fig. 1. g The parts of the wheel are then secured together by the bolts 12, which extend through the flanges 2.

Preferably the rim 6 does not touch or flt that part of the wheel immediately within it, and preferably the portions of the rim which lie beneath the flanges 7 do not touch with their edges the bottoms of the grooves 8. This provides for differences in width and thickness of the rim and in the thickness of the flanges 7 or in the width or depth of the grooves 11 without having to machine all the parts or to exercise particular care as to the size of the parts or the amount of machining. By this construction the rim is supported by the wedging-flanges7 and grooves 11; but as to the same I would not be restricted beyond what the prior art and a broad interpretation of my claims require. For example, the wedging might be had by providing only one inclined roll on the flanges 7 and grooves 11.

The rim 6 may be in sections, as indicated by the division-lines 13 on Fig. l, and may have thereon cog-teeth, sprocket-teeth, or other driving or friction surface.

To prevent the rim turning relatively to the other parts of the wheel, I place one or more keys or lugs 14, extendingly outwardly from the portion 4:, which fits in one or more keyways or grooves 15 in the inner surface of the rim 6. This key has, preferably, side walls sloping outwardly from the upper surface of the key, the upper surface also being inclined to the wheelaxis in order that the whole key may be machined by a correspondingly-sloped tool at a single operation. The

outer surface of the key is inclined toward the hub, as shown in Figs. t and 5, the faces of the key being made by the movement of the tool in the direction of the inclined surface or parallel thereto. By making the key as described and giving the keyway a corre sponding shape the rim will go to its place without binding and will at the time of its seating have the parts of the key andkeyway fitting each other, so as to hold the rim securely from rotation, the flanges 7 and grooves 11 at the same time holding the rim or its sections from movement otherwise.

Although I have described my invention with considerable particularity, 1 would not be thereby limited to the precise construction disclosed, as many changes may be made while still retaining the principles I have discovered and used.

Having described my invention, I claim 1. A sectional wheel, having flanges or ribs and a rim carried thereby and grooved to receive the flanges or ribs.

2. Asectional wheel, having flanges or ribs, a rim carried thereby and grooved to receive the flanges or ribs, means for securing the same together, and other means for prevent ing the rotation of the rim on the flanges.

3. A sectional wheel, having a rim having circular grooves, and flanges or ribs seated in said grooves and supportinginward thrusts on said rim.

4. A sectional wheel, having a rim having Wedging circular grooves and \vedging flanges or ribs seated in said grooves and supporting inward thrusts on said rim.

5. A sectional wheel, having a peripheral portion having opposing flanges, a rim por tion having grooves to receive the said flanges, means to prevent the rim from rotary movement relative to the flanges, and means to secure the said parts together.

6. A sectional wheel, having a hub, a web, and a peripheral portion, the latter composed of a rim having grooves on its opposite sides,

a flange integral with the Web and having its free end extending back over itself and fitting in one of said grooves, a second flange, a web portion and its free end extending back over itself and fitting in the other of said grooves, means to prevent the rim from rotary movement on said flanges, and bolts extending through the said web and the web portion.

7. A sectional wheel, having a hub, a web, and a peripheral portion consisting of a rim having lateral grooves, and flanges carried by the web, one flange being integral with the web and distinct therefrom, and bolts passing through the web for securing the parts together.

8. A sectional wheel, having a peripheral portion having opposing flanges, a rim portion having grooves to receive the said flanges, means to prevent the rim from rotary movement relative to the flanges, and means to secure the said parts together, the key and keyway having diverging side walls.

9. A sectional wheel, having a rim and means for supporting the same, one part having a keyway and the other a key to fit the same, the key having its sides diverging, and its outer face inclined toward the axis of the wheel.

10. A sectional wheel, having a pair of opposing flanges, a key between the same, a rim secured between the flanges and provided with a keyway to receive said key.

Signed at Pittsburg, Pennsylvania, this 17th day of October, A. D. 1904.

FLORENCE C. BIGGERT, J R.

itnesses:

F. N. BARBER, A. M. STEEN. 

